Perm or coloring can break hair and
make it look thinner. Physiological changes can
also cause hair loss. Childbirth, crash dieting
and taking birth control pills all encourage hair
to shed. Normal hair growth should resume after
the condition is corrected.

Since it takes months for hair
to show the damage caused by stress and trauma,
it will also, in turn, take months to heal and
regrow. Most of the damaged hair will have to
fall out before new and healthy growth becomes
obvious.

Regular exercise will help improve
the condition of your hair. Physical activity
reduces stress and increases the blood flow to
the extremities, including the head and scalp.